(19)

(11)

EP 0 619 879 A1

(12)

(43) Date of publication: 19.10.1994 Bulletin 1994/42 (21) Application number: 93902862.0 (22) Date of filing: 30.12.1992

(51) International Patent Classification (IPC):  G01N 1/ 00( . ) G01N 21/ 03( . ) G01N 21/ 35( . ) G01N 33/ 00( . ) G08B 29/ 20( . ) G01N 1/ 22( . ) G01N 21/ 05( . ) G01N 21/ 61( . ) G08B 17/ 117( . ) G01N 21/ 85( . ) (86) International application number: PCT/US1992/011350 (87) International publication number: WO 1993/013401 (08.07.1993 Gazette 1993/16)

(84) Designated Contracting States: DE GB SE (30) Priority: 31.12.1991 US 19910816596 (71) Applicant: GAZTECH INTERNATIONAL CORPORATION Goleta, CA 93117 (US)	(72) Inventor: WONG, Jacob, Y. Santa Barbara, CA 93110 (US) (74) Representative: Wagner, Karl H.  WAGNER & GEYER Patentanwälte Gewürzmühlstrasse 5 D-80538 München D-80538 München (DE)